K 50 SQ - 8 Ohm

Art. No. 2897

5 cm (2") miniature speaker with plastic diaphragm, square metal basket with 4 mounting holes and foam gasket. 2.8 x 0.5 mm contact pin. Thanks to its compact dimensions, suitable for signal output in machines and other equipment where space is at a premium.

*) IP protection class for front side when built into a sealed enclosure

Typical applications
Voice and signal output in machines and other equipment both indoors and outdoors
  • Metal basket
  • Plastic membrane (mylar)
  • Functionally at cold according to EN 60068-2-1/EN 50155

Technical Data

Rated power
2 W
Maximum power
3 W
Nominal impedance Z
8 Ohm
Frequency response
250–10000 Hz
Mean sound pressure level
83 dB (1 W/1 m)
Opening angle (-6 dB)
180°/4000 Hz
Excursion limit
+/−1 mm
Resonance frequency fs
480 Hz
Height of front pole-plate
2 mm
Voice coil diameter
14 mm
Height of winding
3 mm
Cutout diameter
45 mm
Net weight
0.05 kg
D.C. resistance Rdc
7.3 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
0.06 l
Effective piston area Sd
12.5 cm²
Dynamically moved mass Mms
0.4 g
Force factor Bxl
1.12 T m
2.8 x 0.5 mm (+)2.8 x 0.5 mm (−)
Protective system
IP 65
IP 67
Temperature range
−40 ... 80 °C
Frequency- and impedance response
Directivity pattern